Ebay.in — mobile folty no replacement with DO by seller

Address:

Faridabad, Haryana

I bought a HTC desire 816g on ebay .in . I received a folty product. I am going to htc care center the give me a DO certificate for new phone but the condition is only seller can replace the product.then I start contact to ebay the give me a ID for sending the DO certificate .I am sent on same date the can process a claim But after 5 days the reject my claim due to a phone call not received by me because the call a no. that not belongs to me and my ebay account registered mobile no. Now thye suggest me to go HTC and clear my problem. But htc say we replace you device with new because you only have 13 days to bought.with a condition that only seller can replace the device. Please help me for the same. I have all mails by ebay . Thanks & regards,